Steam-engine



(No Model.)

H. E. TRUMBLE. STEAM ENGINE.

Patented Mar. 25, 1890-.

UNITED STATES PATENT OFFICE.

HENRY E. TRUMBLE, OF KALAMAZOO, MICHIGAN, ASSIGNOR OF ONE-HALF TO VAN H. HIGGINS, OF CHICAGO, ILLINOIS.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 424,439, dated March 25, 1890.

Application filed September 2, 1889- Serial No. 322,669. (No model.)

To all whom it may concern:

Be it known that I, HENRY E. TRUMBLE, a citizen of the United States, residing at Kalamazoo, county of Kalamazoo, State of Michigan, have invented a new and useful Steam- Engine, of which the following is a specification.

This invention relates to that class of engines which employ automatically-oscillating pistons which are attached to a rock-shaft and radiate therefrom in the steam-chest.

The object of this invention consists in the construction of an engine in which the piston is composed of two plates end to end and j ointedly attached together and radiating from the rock-shaft, which shaft has hearings in the base of the piston-chamber, said chamber taking steam at the upper or lower end or at some point between said ends and against the side of said piston.

Another object consists in a construction whereby both ends of the jointed piston have rock-bearings in the piston-chamber.

In the drawings forming a part of this specification, Figure 1 is an elevation looking from a point at the left of Fig. 2. Fig. 2 is an elevation looking from a point at the right of Fig. 1 Fig. 3, same as Fig. 2 with steamchest removed. Fig. 4 is the same as Fig. 3 with one wall of the piston-chamloer and the steam-chest removed and a part in section on line 3 in Fig. 5, and Fig. 5 is a section on line 2 2 in Fig. 4.

Referring to the lettered parts of the drawings, A is the piston-chamber; D, the rockshaft, having bearings in the lower end of said chamber; and d e are two plates end to end and jointedly attached together and constituting the piston and radiating from the rock-shaft. In this construction both ends of the piston have rock-bearings, one of said bearings being the bearin g of the rock-shaft D, and said bearing at the other end of the piston consists of the-shortshaft S, which is round in cross-section and which has bearings in the upper end of the piston-chamber A, Figs. 4: and 5. Said shaft S is provided with a slot in which the end of the piston plays when said piston lengthens and shortens during its oscillating movements, and

during which action the shaft S oscillates in its bearings.

Referring to Fig. 3, o 2' are steam-portsv through one of the walls 0 of the pistonchamber A. The position of said ports in relation to the piston-chamber is indicated by the same ports 0 2' in Fig. 4.

In Figs. 1 and 2 a steam-chest B of the ordinary construction is shown attached to the piston chamber so as to register with the steam-ports o 2'. (Shown in Fig. 3.) The steam alternately enters and exhausts through said ports 0 71 during the oscillation of. the piston from one side of the piston-chamber to the other. The steam-chest B may be attached to the piston-chamber at the particular location indicated in Figs. 1, 2, and 3, or it may be located at any other point, so as to admit steam in the piston-chamber against any portion of the sides of the piston 61 e.

At or is shown the steam-supply pipe, and at o is shown the exhaust-pipe in Figs. 1 and 2, and which will be readily understood without further description here.

In Fig. 1, F is a crank on the rock-shaft D, to which crank a connecting-rod may be attached (said rod not here shown) for transmitting motion to other machinery. At E is the bearing to one end of the rock-shaft D.

In Fig. 2, 1' is the valve-rod of the valve in the steam-chest, said valve not being here shown, but is of the ordinary construction and will be readily understood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

In an engine or motor, the combination of the piston-chamber and the two-part jointed piston, the ends of said piston from its central joint having rock-bearings in the two opposite ends of the piston-chamber, substan tially as set forth.

In testimony of the foregoing I have hereunto subscribed my name in presence of two witnesses.

HENRY E. TRUMBLE.

Witnesses:

.R. L. Fnos'r, B. C. FREEMAN. 

